[Build] Workaround for upb 24.x warnings (#34200)
This is to address too many warnings coming from upb 24.x
```
In file included from external/upb/upb/mini_table/field.h:32:
external/upb/upb/mini_table/internal/message.h:36:14:
warning: redefinition of typedef 'upb_Message' is a C11 feature [-Wtypedef-redefinition]
typedef void upb_Message;
^
external/upb/upb/message/tagged_ptr.h:40:14: note: previous definition is here
typedef void upb_Message;
^
1 warning generated.
```
diff --git a/test/distrib/cpp/run_distrib_test_cmake.sh b/test/distrib/cpp/run_distrib_test_cmake.sh
index d282d15..031f26d 100755
--- a/test/distrib/cpp/run_distrib_test_cmake.sh
+++ b/test/distrib/cpp/run_distrib_test_cmake.sh
@@ -66,7 +66,8 @@
# Get list of submodules from the .gitmodules file since for running "git submodule foreach"
# we'd need to be in a git workspace (and that's not the case when running
# distribtests as a bazel action)
-grep 'path = ' .gitmodules | sed 's/^.*path = //' | xargs rm -rf
+# TODO(veblush): Remove upb exception
+grep 'path = ' .gitmodules | sed 's/^.*path = //' | grep -v 'third_party/upb' | xargs rm -rf
# Install gRPC
mkdir -p "cmake/build"
diff --git a/test/distrib/cpp/run_distrib_test_cmake_pkgconfig.sh b/test/distrib/cpp/run_distrib_test_cmake_pkgconfig.sh
index 48e2a4d..6ed7aea 100755
--- a/test/distrib/cpp/run_distrib_test_cmake_pkgconfig.sh
+++ b/test/distrib/cpp/run_distrib_test_cmake_pkgconfig.sh
@@ -70,7 +70,8 @@
# Get list of submodules from the .gitmodules file since for "git submodule foreach"
# we'd need to be in a git workspace (and that's not the case when running
# distribtests as a bazel action)
-grep 'path = ' .gitmodules | sed 's/^.*path = //' | xargs rm -rf
+# TODO(veblush): Remove upb exception
+grep 'path = ' .gitmodules | sed 's/^.*path = //' | grep -v 'third_party/upb' | xargs rm -rf
# Install gRPC
# TODO(jtattermusch): avoid the need for setting utf8_range_DIR
diff --git a/tools/bazel.rc b/tools/bazel.rc
index d32e9af..e2795a0 100644
--- a/tools/bazel.rc
+++ b/tools/bazel.rc
@@ -12,6 +12,12 @@
build:freebsd --cxxopt='-std=c++14'
build:freebsd --host_cxxopt='-std=c++14'
+# TODO(veblush): Remove these once upb is upgraded to 25.x or later
+build:linux --copt=-Wno-typedef-redefinition
+build:linux --host_copt=-Wno-typedef-redefinition
+build:macos --copt=-Wno-typedef-redefinition
+build:macos --host_copt=-Wno-typedef-redefinition
+
# Don't trigger --config=<host platform> when cross-compiling.
build:android --noenable_platform_specific_config
build:ios --noenable_platform_specific_config
